syzkaller login: [ 40.919154] BUG: Bad rss-counter state mm:000000005755940f type:MM_FILEPAGES val:33 [ 40.920309] BUG: Bad rss-counter state mm:000000005755940f type:MM_ANONPAGES val:22 [ 40.962078] ================================================================== [ 40.963024] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.964085] Read of size 8 at addr ffff88800b974798 by task sshd/219 [ 40.964867] [ 40.965087] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.965981] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.966962] Call Trace: [ 40.967300] [ 40.967588] dump_stack_lvl+0x91/0xf0 [ 40.968083] print_report+0xcc/0x620 [ 40.968569] ? __virt_addr_valid+0x102/0x340 [ 40.969137] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.969794] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.970430] kasan_report+0xbe/0xf0 [ 40.970914] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.971549] vma_interval_tree_remove+0xc75/0xec0 [ 40.972165] vma_prepare+0xc54/0x11a0 [ 40.972645] __split_vma+0x5af/0x950 [ 40.973131] ? __pfx___split_vma+0x10/0x10 [ 40.973691] ? find_held_lock+0x2c/0x110 [ 40.974216] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.974788] ? lock_is_held_type+0x9f/0x120 [ 40.975346] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.975956] ? mtree_range_walk+0x632/0x900 [ 40.976518] ? mas_walk+0x5c7/0x7c0 [ 40.977021] do_vmi_munmap+0x1f1/0x2b0 [ 40.977492] mmap_region+0x1f9/0x2660 [ 40.978053] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.978667] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.979536] ? __pfx_lock_acquire+0x10/0x10 [ 40.980199] ? __pfx_mmap_region+0x10/0x10 [ 40.980849] ? security_mmap_addr+0x7d/0xa0 [ 40.981508] ? get_unmapped_area+0x1f5/0x3f0 [ 40.982186] do_mmap+0x854/0xf00 [ 40.982711] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.983314] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.983990] ksys_mmap_pgoff+0x3af/0x500 [ 40.984607] do_syscall_64+0x3f/0x90 [ 40.985174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.985952] RIP: 0033:0x7f53de123d82 [ 40.986504] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 40.989069] RSP: 002b:00007fff0448f5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.990172] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f53de123d82 [ 40.991202] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f53dd55d000 [ 40.992226] RBP: 00007f53dd55d000 R08: 0000000000000009 R09: 0000000000001000 [ 40.993257] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561db0fe1f70 [ 40.994312] R13: 00007fff0448f610 R14: 00007fff0448f640 R15: 00007fff0448f9a0 [ 40.995251] [ 40.995540] [ 40.995752] Allocated by task 211: [ 40.996170] kasan_save_stack+0x22/0x50 [ 40.996674] kasan_set_track+0x25/0x30 [ 40.997170] __kasan_slab_alloc+0x59/0x70 [ 40.997705] kmem_cache_alloc+0x16b/0x370 [ 40.998222] vm_area_dup+0x20/0x160 [ 40.998675] __split_vma+0x170/0x950 [ 40.999133] split_vma+0xc6/0x110 [ 40.999569] mprotect_fixup+0x8d2/0xb30 [ 41.000072] do_mprotect_pkey+0x87e/0xd40 [ 41.000586] __x64_sys_mprotect+0x78/0xc0 [ 41.001104] do_syscall_64+0x3f/0x90 [ 41.001595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.002234] [ 41.002445] Freed by task 211: [ 41.002845] kasan_save_stack+0x22/0x50 [ 41.003339] kasan_set_track+0x25/0x30 [ 41.003838] kasan_save_free_info+0x2b/0x50 [ 41.004369] __kasan_slab_free+0x10a/0x190 [ 41.004903] kmem_cache_free+0x10d/0x4d0 [ 41.005427] rcu_core+0x8c8/0x2860 [ 41.005893] __do_softirq+0x1b7/0x7d4 [ 41.006364] [ 41.006572] Last potentially related work creation: [ 41.007153] kasan_save_stack+0x22/0x50 [ 41.007656] __kasan_record_aux_stack+0x8e/0xa0 [ 41.008228] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.008861] remove_vma+0x139/0x170 [ 41.009308] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.009860] do_vmi_munmap+0x1f1/0x2b0 [ 41.010338] __vm_munmap+0x138/0x3a0 [ 41.010808] __x64_sys_munmap+0x59/0x80 [ 41.011295] do_syscall_64+0x3f/0x90 [ 41.011773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.012403] [ 41.012619] Second to last potentially related work creation: [ 41.013305] kasan_save_stack+0x22/0x50 [ 41.013830] __kasan_record_aux_stack+0x8e/0xa0 [ 41.014402] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.015033] remove_vma+0x139/0x170 [ 41.015482] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.016034] do_vmi_munmap+0x1f1/0x2b0 [ 41.016512] mmap_region+0x1f9/0x2660 [ 41.016992] do_mmap+0x854/0xf00 [ 41.017417] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.017929] ksys_mmap_pgoff+0x3af/0x500 [ 41.018431] do_syscall_64+0x3f/0x90 [ 41.018898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.019531] [ 41.019746] The buggy address belongs to the object at ffff88800b974740 [ 41.019746] which belongs to the cache vm_area_struct of size 168 [ 41.021213] The buggy address is located 88 bytes inside of [ 41.021213] freed 168-byte region [ffff88800b974740, ffff88800b9747e8) [ 41.022638] [ 41.022849] The buggy address belongs to the physical page: [ 41.023518] page:0000000063b98a34 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb974 [ 41.024604] memcg:ffff888014694901 [ 41.025029] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.025735] page_type: 0xffffffff() [ 41.026181] raw: 0100000000000200 ffff88800879fc80 ffffea00003c6300 0000000000000007 [ 41.027095] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014694901 [ 41.028001] page dumped because: kasan: bad access detected [ 41.028657] [ 41.028868] Memory state around the buggy address: [ 41.029476] ffff88800b974680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.030319] ffff88800b974700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 41.031165] >ffff88800b974780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 41.032020] ^ [ 41.032503] ffff88800b974800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 41.033351] ffff88800b974880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 41.034203] ================================================================== [ 41.035207] Disabling lock debugging due to kernel taint [ 43.228737] BUG: Bad rss-counter state mm:000000008bf574e1 type:MM_FILEPAGES val:33 [ 43.229738] BUG: Bad rss-counter state mm:000000008bf574e1 type:MM_ANONPAGES val:22 [ 43.707284] BUG: Bad rss-counter state mm:000000008cb8d2ce type:MM_FILEPAGES val:33 [ 43.708284] BUG: Bad rss-counter state mm:000000008cb8d2ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51603' (ECDSA) to the list of known hosts. 2023/06/20 05:36:17 fuzzer started 2023/06/20 05:36:17 dialing manager at localhost:44161 2023/06/20 05:36:17 checking machine... 2023/06/20 05:36:17 checking revisions... [ 44.433025] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:36:17 testing simple program... [ 44.488142] cgroup: Unknown subsys name 'net' [ 44.557842] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:36:05 Registers: info registers vcpu 0 RAX=ffffffff864b1c91 RBX=0000000000000001 RCX=ffffffff864b1c8c RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b1c90 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5420 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130abf RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fafb5d56010 CR3=000000000e350000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2037313a36333a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a36333a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff8880181d1b40 RSI=ffffffff8170a911 RDI=0000000000000007 RBP=1ffff110033c1ee0 RSP=ffff888019e0f6f0 R8 =0000000000000007 R9 =0000000000000000 R10=8000000015f76025 R11=0000000000000000 R12=ffff88801a2e4488 R13=00007ffa85bb3000 R14=8000000015f76025 R15=dffffc0000000000 RIP=ffffffff814c0800 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffa85be3900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffa85bc2020 CR3=000000001a278000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000